Hand calculation ta akto bujea daw plz😔

Eita C hobe na? Hajari Sir er boi e A dawoa

Eita ki amr kora raff er sutro diye hobe na? Hoile ans to onno rokom ashe,
Kibabe hobe ashole

sohojvabe bekkha diye bujhan...ami confused...konta sothik ans hobe?option b nki d?

Eita Oxygen hobe na? Eikhane Oxygen er to Anobik bhor kom

Vaiya amk eikhane onupat er counta hate kivabe korbo bujhaye den plz

solve please

Eita A hobe na?

solve?

solve plz

solve plz

solve plz

Eta r ans ki hbe..kore den

solve plz

solve plz

solve?

plz solve

solve?

solve?

Solve plz