If A + B means A is the mother of B; A / B means A is the brother of B; A x B means A is the son of B and A - B means A is the daughter of B, which of the following means C is the niece of D?

Option 4 : C - P / D

Refer the table:

Preparing the family tree using the following symbols:

[ alt="LR table" src="//storage.googleapis.com/tb-img/production/20/05/LR%20table.PNG" style="width: 206px; height: 276px;">

1) D - C

[ alt="10.09.2018.005" src="//storage.googleapis.com/tb-img/production/18/09/10.09.2018.005.PNG">

Here, D is the daughter of C.

2) D x P - C

[ alt="10.09.2018.006" src="//storage.googleapis.com/tb-img/production/18/09/10.09.2018.006.PNG" style="height:155px; width:45px">

Here, C is either the grandmother or grandfather of D.

3) P + D / C

[ alt="10.09.2018.008" src="//storage.googleapis.com/tb-img/production/18/09/10.09.2018.008.PNG">

Here, D is the brother of C.

4) C - P / D

[ alt="10.09.2018.007" src="//storage.googleapis.com/tb-img/production/18/09/10.09.2018.007.PNG" style="height: 108px; width: 89px;">

Here, C is niece is D.

Hence, the correct option is 4.