Question : Spot the odd item in the following :

Option 1: Basalt

Option 2: Ruby

Option 3: Emerald

Option 4: Sapphire

Question : Spot the odd item of the following :

Option 1: shale

Option 2: Marble

Option 3: Limestone

Option 4: Sandstone.

Question : Which one of the following is a Sedimentary Rock ?

Option 1: Granite

Option 2: Charnockite

Option 3: Basalt

Option 4: Arkose

Question : Directions: In the following question, find the odd number pair from the given alternatives.

Option 1: 1, 0.75, 0.5, 1.25

Option 2: 4, 3, 2, 5 

Option 3: 1, 4, 2, 8 

Option 4: 2, 1.5, 1, 2.5 

Question : Directions: In the following question, find the odd number pair from the given alternatives.

Option 1: 16 

Option 2: 4

Option 3: 2

Option 4: 36

Question : Simplify the following expression.
$(4 x + 1)^2 - (4 x + 3)(4 x - 1)$

Option 1: $(4 x + 1)$

Option 2: $4$

Option 3: $(4x- 3)$

Option 4: $4x$