In the series below, different letters stand for various mathematical operations and symbols as indicated: P: + Q: - R: × S: ÷ T: = U: > V: < Choose the option which is correct according to the given operations and symbols.

If 'A' stands for '÷', 'B' stands for '×', 'C' stands for '+' and 'D' stands for '-', then what will come in place of the question mark (?) in the following equation? 13 B 2 C 6 D 8 A 4 = ?

Which two signs should be interchanged to make the given equation correct? 30 + 35 × 7 - 3 ÷ 10 = 5