Explanation

Self-discipline is the foundation of effective behavior and learning in a classroom.

When students and teachers both practice self-control, a positive and respectful classroom environment is maintained.

Explanation

حروف جار ایسے الفاظ ہوتے ہیں جو دوسرے لفظ کے ساتھ تعلق قائم کرتے ہیں، جیسے "سے"، "کا"، "میں" وغیرہ۔

یہ الفاظ جملے میں مخصوص معنی اور ربط پیدا کرتے ہیں۔

Explanation

Explanation

The phrase "came off" means something got detached or separated from its place.

Correct sentence: The handle of my bicycle suddenly came off. It is in my hands now.

Explanation

For matrices A and B, the inverse of the product AB is given by:

(AB)⁻¹ = B⁻¹A⁻¹

Explanation

When two circles touch each other externally, they have a single point of contact.

The distance between their centers (C1C2) is equal to the sum of their radii (r1 + r2).

Explanation

Arrive : Depart is a pair of opposites.

Similarly, Use and Misuse are opposites — one is proper use, the other is wrong use.

Explanation

X-rays are electromagnetic waves and not charged particles, so they are not deflected by electric or magnetic fields.

They travel in straight lines, affect photographic plates, and have properties of electromagnetic radiation.

Explanation

The atomic number of silver (Ag) is 47. Its electronic configuration is [Kr] 4d¹⁰ 5s¹.

The valence electrons are in the outermost shell, which is the 5s orbital with 1 electron.

The number of valence electrons is 1.

Explanation

Rectangle : Cylinder → A rectangle is a 2D shape; a cylinder is a 3D shape with a rectangular (curved) side base.

Triangle : Cone → A triangle (2D) relates to a cone (3D shape with a triangular cross-section).