In which of the following groups, odd one out is circled incorrectly?
ASand, 
Sandust, Talcum powder
BWood, Plastic, Aluminium, 
C
Iron, Copper, Zinc
DGlass marble, Stapler pin, 
Needle
Ans 1: (Master Answer)
B
Sand, Sawdust and Talcum Powder particles are not soluble in water. Sugar particles are soluble in water. So, sugar is the odd one out, and it is circled correctly.
Wood, Plastic and Rubber are non-metals, while Aluminium is a metal. So, Aluminium is the odd one out. That means Rubber is circled incorrectly.
Iron, Copper, Zinc and Mercury – all are solid metals. But Mercury is the only metal that is liquid at standard temperature and pressure. So, mercury is the odd one out, and it is circled correctly.
Glass Marble, Stapler Pin and Needle are objects shapes and manufactured by men. Feather is a naturally occurring object. So, feather is the odd one out, and it is circled correctly.