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Solution


Q.

Assertion: Boiling point of PH3<AsH3<SbH3<NH3

Reason: NH3 possesses intermolecular H-bonding
1 A is True, R is true R is correct explanation of A  
2 A is True, R is True R is not correct explanation of A  
3 A is True, R is false  
4 A is false, R is True  

Ans.

(4)

B.P.  PH3<AsH3<NH3<SbH3