Explanation

The correct preposition used with "expertise" is "in" when referring to a subject or field.

So, "He has expertise in the famous world language" is grammatically correct.

Explanation

قرآن مجید حق لے کر نازل ہوا، جو سچائی اور ہدایت پر مبنی ہے۔

یہ اللہ تعالیٰ کا کلام ہے جو انسانوں کو صحیح راستہ دکھانے کے لیے نازل ہوا۔

Explanation

The lesson "Water Scarcity" emphasizes the need to save water and avoid wasting it.

Proper conservation helps manage limited water resources effectively.

Explanation

A tangent is a line that touches the circle at exactly one point and is perpendicular to the radius at that point.

It does not cross into the circle’s interior.

Explanation

The sentence contrasts two opposite traits: being shy but sometimes outgoing.

This shows Salman’s personality can vary between reserved and sociable.

Explanation

Table tennis balls are traditionally made from casein, a protein derived from milk.

Casein gives the balls their lightweight and durable properties for gameplay.

Explanation

Dot pitch refers to the distance between pixels on a monitor, affecting pixel density per inch.

It influences the sharpness and clarity of the display image.

Explanation

An Alternate key is any candidate key not chosen as the primary key.

It can still uniquely identify records, but isn't used as the main identifier.

Explanation

The seven subgroups of the psychomotor domain, as classified by Simpson, are as follows:

1. Perception
2. Set
3. Guided Response
4. Mechanism
5. Complex Overt Response
6. Adaptation
7. Origination

Explanation

In the SMART criteria, R stands for Realistic, meaning the objective should be achievable and practical.

SMART stands for Specific, Measurable, Achievable, Realistic, Time-bound.