Read the following information to answer these question
(i) A` Delta` B means A is mother of B.
(ii) A©B means A is sister of B.
(iiii) A*B means A is father of B.
(iv) A` beta` B means A is brother of B.
Which of the following means R is grandfather of Q?

Options

A. `Q Delta F ^(**)E ^(**)R`
B. `R ^(**) S © T Delta Q`
C. `R beta L beta M ^(**)Q`
D. `R ^(**)G ^(**) H Delta Q`

Answer

B

Explanation

Choice 1 is wrong as R must appear before Q. Choice 2 has a generation gap of `1 + 0 + 1 =2.` Let us draw the family tree:
`{:(R (+)),(|) , (S (-) - T (-)),(" "|) , (" "Q):}`
Indeed 2 is correct, note that R is maternal grandfather of Q.