Question

You wish to make n-type silicon.

Select all suitable dopant atoms from the following list:

P
B
Mg
Ga
As
In
Sb
Al
Tl
H

Answer 1

you should chose that elements which are on the right side group(column) of the Silicon group column in periodic table
P is one of them , like that can u find others too with the help of Periodic table:)