Q.
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a
Large rings with more than six C atoms are stable but difficult to prepare.
b
Decreasing order of thermal stability of cyclic rings is:6>7,5>8,9>>4>3.
c
Decreasing order of probability of ring closure is:3>4>5>6>7 >8>9
d
Ease of synthesis of cyclo compounds is:5>3,6>4,7,8,9
answer is A.
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