The correct options are
A 10
B 5
Here,
Every even multiple of 5 results in a number which has a zero in its ones place.
Example:
5×2=10
5×4=20
.
.
5×30=150
Divisibility test for 10
It states that any number which has zero in at ones place is divisible by 10.
Divisibility of 5
It states that any number which has a zero or 5 at ones place is divisible by 5.
∴ Even multiples of 5 are divisible by both 10 and 5.