Explanation: In the context of the question, we are dealing with the concept of antonyms, which are words that have opposite meanings. The word "famous" means well-known or celebrated by many people. The opposite of "famous" is "unknown," which means not known or recognized by many people.
To understand this concept, let's break it down further. When we say someone is "famous," we mean that they are widely recognized and celebrated. This could be due to their achievements, their work, or their public presence. On the other hand, when someone is "unknown," they are not recognized or celebrated by many people. They may not have a public presence or may not be widely recognized for their work or achievements.
In the context of the sentence, "Shahrukh Khan is a 'famous' actor today. But when he came to Mumbai several years ago, he was almost.....," the word "unknown" fits perfectly. It indicates that Shahrukh Khan was not recognized or celebrated by many people when he first came to Mumbai, which is the opposite of his current status as a famous actor.
It is important to note that the other options do not fit the context of the sentence. "Poor" refers to a lack of money or resources, which is not the opposite of being famous. "Worthless" means having no value or importance, which is not directly related to the concept of fame or recognition. "Familiar" means known or recognized, which is the same as being famous, not the opposite.
Understanding antonyms and their usage in context is crucial for improving vocabulary and comprehension skills. It helps in identifying the correct word to use in a given situation and in understanding the nuances of language. In this case, the correct antonym for "famous" is "unknown," which accurately describes Shahrukh Khan's initial state when he came to Mumbai.