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## 4 Answers

Best answer

Correct Options: **A;D**

$4 \rightarrow$ When each leaf has $3$ childs. So $9/3 = 3$ Internal nodes, Then one internal node those internal nodes.

$7 \rightarrow$ When each leaf has $2$ childs & one leaf out of $4$ get $3$ childs. Ex $\rightarrow 8/4 = 2$ child per internal node. Then one of that internal node get extra third child. Then $2$ internal nodes to connect these $4$. Then $1$ internal node to connect this $2$. So $4+2+1 = 7$.

No other way is possible.

### 8 Comments

@srestha plz check bcoz it not satisfy this which is given in question **All paths from root to the leaves have the same length.**