ABCD is a rhombus with diagonals AC and BD. Then, which one among the following is correct ?
[a] AC and BD bisect each other
but not necessarily perpendi-
cular to each other.
[b] AC and BD are perpendicular
to each other but not neces-
sarily bisect to each other.
[c] AC and BD bisect each other
and perpendicular to each
other.
[d] AC and BD neither bisect
each other nor perpendicular
to each other.

please tell whether the answer in no [c] and why and get 8 points.​