Name the class to which the following levers belong :

(a) A pair of scissors,

(b) a lemon squeezer,

(c) a nut cracker,

(d) a pair of sugar tongs,

(e) a beam balance,

(f) an oar rowing a boat,

(g) a wheel barrow,

(h) a see-saw,

(i) a pair of pliers,

(j) a crowbar.

(a) A pair of scissors → Class I lever

(b) A lemon squeezer → Class II lever

(c) A nutcracker → Class II lever

(d) A pair of sugar tongs → Class III lever

(e) A beam balance → Class I lever

(f) An oar oar rowing a boat → Class I lever

(g) A wheelbarrow → Class II lever

(h) A seesaw → Class I lever

(i) A pair of pliers → Class I lever

(j) A crowbar → Class I lever