Explanation

Given:

Sum = 2300

Average = 46

Number of quantities = Sum / Average

= 2300 / 46

= 50

Explanation

Tetanus toxin (produced by Clostridium tetani) affects the nervous system, blocking inhibitory signals to muscles.

This causes sustained and painful muscle contractions.

It is also known as "lockjaw" or spastic paralysis.

Explanation

Imagery appeals to the senses — smell, sight, touch, etc.

The sentence describes scent and appearance, creating a vivid sensory image.

Explanation

"Flock" is the correct collective noun for sheep (also birds).

"A flock of sheep" is a commonly used and grammatically correct phrase.

Explanation

"Which" is used when choosing from a known or limited set (like specific paintings).

The sentence is asking to identify one from several, so "Which" fits correctly.

Explanation

To convert 17 m/sec to km/hr:

1 m/sec = 3.6 km/hr

17 m/sec = 17 × 3.6 km/hr

= 61.2 km/hr

Explanation

The formula to convert temperature from Celsius to Fahrenheit: T(°F) = 1.8T(°C) + 32

The formula to temperature convert Fahrenheit to Celsius: T(°C) = T(°F) - 32/1.8

Explanation

Let the son's present age be x.

The man's present age = 4x

In 5 years:

Son's age = x + 5

Man's age = 4x + 5

According to the problem:

4x + 5 = 3(x + 5)

4x + 5 = 3x + 15

4x - 3x = 15 - 5

x = 10

Explanation

Oppositional Defiant Disorder (ODD) is a psychiatric condition where a person, usually a child, displays persistent anger, irritability, and defiant behavior toward authority figures.

It is marked by aggressiveness, argumentativeness, and intentional annoyance of others.

Explanation

The three main types of assessment based on function are:

1. Diagnostic (before instruction),
2. Formative (during instruction),
3. Summative (after instruction).

Comparative Assessment is not a standard type; it refers to comparing students, which is not a functional classification of assessment.