→aIn flightsastronauts →bhave to bear muscle→catrophy caused weightlessness→dNo Error

→aIn flightsastronauts →bhave to bear muscle→catrophy caused weightlessness→dNo Error Correct Answer b

In flights, astronauts have to bear muscle atrophy caused by weightlessness. বাক্যটি পড়ে বোঝা যায় এটিতে কোনো ভুল নেই। সুতরাং সঠিক উওর (d)।
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