Answer:
B
Explanation:
Let us see the converse of each statement one by one and see whether it holds true.
1) If a number is greater than 6, then the number is greater than 4.
The converse of the above statement will be , if a number is greater than 4 , it is greater than 6.
Which is false.
2).If two lines are coplanar, then the lines lie in the same plane.
The converse is , if the two lines lies in the same plane, they are coplanar. Which is true.
3).If a number is less than 10, then the number is less than 20
The converse is if a number is less than 20, it is less than 10 too. Which is not true.
Hence the only option having true converse is B.