1.

(A) N_(2)O is called laughing gas (R ) N_(2)O causes hysterical laugh.

Answer»

Both (A) and (R ) are TRUE and (R ) is the correct explanation of (A)
Both (A) and (R ) are true and (R ) is not the correct explanation of (A)
(A) is true but (R ) is false
Both (A) and (R ) are false

ANSWER :1


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