Match the peeling technique in Column I with the vegetable, for which it is used in industry, given in Column II. 
Step 1: Knife peeling
Knife peeling is mostly used for vegetables like cucumber, where manual/simple mechanical removal of peel is required. $⇒$ P – 4.
Step 2: Abrasion peeling
This method uses rollers or brushes to physically abrade the skin off. It is widely used in potato peeling for chips and fries. $⇒$ Q – 3.
Step 3: Flame peeling
Flame peeling is suitable for vegetables with thin skins like brinjal (eggplant) where a flame burns off the peel. $⇒$ R – 1.
Step 4: Flash peeling
Flash peeling (steam or hot water treatment followed by sudden cooling) is applied to tomatoes, which loosens the peel for easy removal. $⇒$ S – 2. Hence, the correct matching is: P-4, Q-3, R-1, S-2.
Potato slices weighing 50 kg is dried from 60% moisture content (wet basis) to 5% moisture content (dry basis). The amount of dried potato slices obtained (in kg) is ............ (Answer in integer)