15. Which is the major product of the following reaction?(A)(B)(C)(D)

2. How many of the following statements is/are correct? (I) Gauche form is the most stable conformer of butane. (II) In cyclopropane, the maximum electron density between two carbon atoms corresponds to the internuclear axis. (III) According to Bacyer strain theory, cyclopentane has greater angle strain than cyclohexane. (A)0(B)1 (C)2 (D)3