There are two different solutions in set up P and Q as shown in figure. The bulb in the set up P glows more brightly as compared to that of the set up Q. What are the possible causes for this? (i) The connections of the circuit Q may be loose. (ii) The liquid in Q may have small conductivity. (iii) Liquid in P is equivalent to a battery while liquid in Q is equivalent to a cell of the battery of liquid P.

• A.  Only (i) and (ii) 
• B.  Only (ii) and (iii)
• C.      Only (i)    
• D.  Only (ii)