If P stands for ‘÷’, Q stands for ‘×’, R stands for ‘+’ and S stands for ‘–’. Then, which one of the following equation is correct ? 18 Q 12 P 4 R 5 S 6 = ?

56 36 53 59

53

18 Q 12 P 4 R 5 S 6 18 × 12 ÷ 4 + 5 – 6 \(\frac{18×12}{4}+5-6\) =  54 + 5 – 6 =  53