নিম্নে প্রদত্ত জোড়গুলির মধ্যে কোনগুলি আইসোটোপ ?

B. X3470 , X3370&# </label> </span> </span> </div> </div> <!--end::option 2--> <!--begin::option 3--> <div class="col-md-6"> <div class="text-dark fs-4 "> <span class="d-flex"> <span class="me-2"> <i class="fas fa-dot-circle text-dark"></i> </span> <span class="overflow-auto scroll-bar-none"> <label for="kkradio_option3_222013">none </label> </span> </span> </div> </div> <!--end::option 3--> <!--begin::option 4--> <div class="col-md-6"> </div> <!--end::option 4--> <!--begin::option 5--> <!--end::option 5--> </div> <div class="px-0 overflow-auto scroll-bar-none" style="margin-left: -4px;"> <a href=" https://sattacademy.com/admission?categories%5B%5D=97 "> <span class="badge badge-light fs-7 mb-0 mt-3 text-dark fw-normal text-hover-primary">রাজশাহী বিশ্ববিদ্যালয়</span> </a> <a href=" https://sattacademy.com/admission/mcq/h-%E0%A6%87%E0%A6%89%E0%A6%A8%E0%A6%BF%E0%A6%9F-2013-2014/all "> <span class="badge badge-light fs-7 mb-0 mt-3 text-dark fw-normal text-hover-primary">H ইউনিট : 2013-2014</span> </a> <a href=" https://sattacademy.com/admission/subject/mcq/sid=76 "> <span class="badge badge-light fs-7 mb-0 mt-3 text-dark fw-normal text-hover-primary">রসায়ন</span> </a> <a href=" https://sattacademy.com/admission/%E0%A6%AE%E0%A7%8C%E0%A6%B2%E0%A7%87%E0%A6%B0-%E0%A6%A4%E0%A7%87%E0%A6%9C%E0%A6%B8%E0%A7%8D%E0%A6%95%E0%A7%8D%E0%A6%B0%E0%A6%BF%E0%A7%9F%E0%A6%A4%E0%A6%BE-%E0%A6%93-%E0%A6%A4%E0%A7%87%E0%A6%9C%E0%A6%B8%E0%A7%8D%E0%A6%95%E0%A7%8D%E0%A6%B0%E0%A6%BF%E0%A7%9F-%E0%A6%86%E0%A6%87%E0%A6%B8%E0%A7%8B%E0%A6%9F%E0%A7%8B%E0%A6%AA "> <span class="badge badge-light fs-7 mb-0 mt-3 text-dark fw-normal text-hover-primary">মৌলের তেজস্ক্রিয়তা ও তেজস্ক্রিয় আইসোটোপ</span> </a> </div> </div> <div class="card-footer py-2 px-0 mx-0 mx-md-2 my-0"> <div class="d-flex justify-content-between align-items-center"> <div class="description"> <span class="fs-7 fw-bold text-black text-hover-primary cursor-pointer show-des"> <a href="javascript:void(0)" class="me-2 px-4 fw-bolder 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জোড়গুলির মধ্যে কোনগুলি আইসোটোপ ?</h3> <p><strong>আইসোটোপ</strong> ➞ প্রোটন সংখ্যা সমান কিন্তু ভরসংখ্যা ভিন্ন<br><strong>আইসোবার</strong> ➞ প্রোটন সংখ্যা অসমান কিন্তু ভরসংখ্যা সমান<br><strong>আইসোটোন</strong> ➞ নিউট্রন সংখ্যা সমান কিন্তু প্রোটন সংখ্যা অসমান<br><strong>আইসোমার</strong> ➞ পরমাণু সংখ্যা এক কিন্তু পরমাণু বিন্যাস ভিন্ন</p> </div> </div> <div class="d-flex align-items-center justify-content-between mb-3"> <div class="fs-7 fw-bold"> <span class="text-muted fs-9">2 years ago</span> </div> <div> <a href="javascript:void(0)" class=" description-like me-10 me-md-15" data-description_id="94575" data-btntype="like" data-vote_id=""> <i class="fas fa-thumbs-up fs-7 "></i><span class="des-like text-dark fs-7 fw-bold ms-2">0</span> </a> <a href="javascript:void(0)" class=" description-like me-10 me-md-15" data-description_id="94575" data-btntype="dislike" data-vote_id=""> <i class="fas fa-thumbs-down fs-7 "></i><span class="des-like text-dark fs-7 fw-bold ms-2">0</span> </a> </div> 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