1.

A radioactive nucleus \[_{92}{{X}^{235}}\]decays to \[_{91}{{Y}^{231}}\]. Which of the following particles are emitted                       [MP PMT 1995]

A.            One alpha and one electron 
B.            Two deuterons and one positron
C.            One alpha and one proton
D.            One proton and four neutrons
Answer» B.            Two deuterons and one positron


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