In terms of percentage profit which is the best transaction ?

	C.P. (in Rs.)	Profit (in Rs.)
i.	36	17
ii.	50	24
iii.	40	19
iv.	60	29

In such type of pattern based question adopt option approach,
1^st → Check largest value of cost price
2^nd → Check smallest value of cost price
mark the answer which is greatest.
$$\eqalign{ & {\text{Option D}} \cr & {{\text{1}}^{{\text{st}}}} \to \frac{{29}}{{60}} \times 100 \cr & \,\,\,\,\,\,\,\, = 48.33 \cr & {\text{Option A}} \cr & {{\text{2}}^{{\text{nd}}}} \to \frac{{17}}{{36}} \times 100 \cr & \,\,\,\,\,\,\,\,\, = 47.22\left( {{\text{wrong}}} \right) \cr} $$