Identify the interjection in the sentence given below-
Ouch! That soup is hot.
a) That
b) Is
c) Hot
d) Ouch

Hint: An interjection is an abrupt remark, especially as an aside or interruption. For example Barracking and interjections from the protesters.

Complete answer:
An interjection is a word or expression that occurs as an utterance on its own and expresses a spontaneous feeling or reaction. It is a diverse category, encompassing many different parts of speech, such as exclamations, curses, greetings, response particles, hesitation markers, and other words. For example: ah! dear me! etc. In the given question we are asked to identify the interjection in the sentence given.
Now, let us examine all the given options to find out the correct answer :
Option ‘a’ is That. It is a pronoun which means – used to identify a specific person or thing observed or heard by the speaker. For example, that's his wife over there.
Option ‘b’ is Is. It is not an interjection. It is generally used as a helping verb which means “third-person singular present of be”.
Option ‘c’ is Hot. It is an adjective which means having a high degree of heat or high temperature. It is not an interjection.
Option ‘d’ is Ouch. It is an exclamatory word, which is an interjection. It is used to express pain. For example: Ouch! I've trodden on a thistle.
As we have analyzed all the given options, we can easily figure out the correct answer. Here, the interjection in the given sentence – ‘Ouch! That soup is hot' is ‘ouch’. Hence, option ‘d’ is the correct option.

Note:
In contrast to typical words and sentences, the function of most interjections is related to an expression of feeling, rather than representing some idea or concept. Generally, interjections can be classified into three types – volitive, emotive, or cognitive.