Q42. In the given compound, the number of $2 ^ { \circ }$ carbon atom $/ \mathrm { s }$ is $\_\_\_\_$ . [Figure] (1) Four (2) Two (3) One (4) Three
Q42. In the given compound, the number of $2 ^ { \circ }$ carbon atom $/ \mathrm { s }$ is $\_\_\_\_$ .\\
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(1) Four\\
(2) Two\\
(3) One\\
(4) Three