Answer:
is the answer.
Explanation:
It is given that in a right angle triangle angle B is a right angle triangle and

Now we see in the figure attached Base(adjacent side) is 12 and hypotenuse is 13.
We have to find sina.
since

We will find the length of hypotenuse with the help of Pythagoras theorem.
BC = √(13²-12²) = √(169-144) = √25 = 5
Now from the given triangle

The correct option is
