Consider the following statements:
S1: Hydraulic washing is not preferable if the ore and the impurities have similar specific gravities.
S2: Magnetic separation cannot be used if the ore is non-magnetic in nature.
S3: Collectors have hydrophobic and hydrophilic part they occupies the air water interface and entraps the particles.
The correct statement(s) among the ones given is/are
(1) S2 only
(2) S1 and S3 Only
(3) S2 and S3 Only
(4) S1, S2 and S3
