Correct Answer - Option 4 : Both I and II
Sign language is a visual language that uses hand shapes (the shape of the hand for different words or letters of the alphabet), movements, facial expressions and body language to convey meaning. Every sign language has a comprehensive vocabulary and its own grammatical rules. These grammatical rules are different from that of spoken languages. Sign language is used by people with different degrees of hearing loss. Some people learn it as young children, while others choose to learn it later in life.
Note that:
- Communities of individuals with hearing impairment throughout the world use their own sign language.
- Each sign language has developed separately and each is a distinct language.
- When we write something, the letters or words so used are symbols, the same is the case with number method.
- The facial expressions and body movements involved too differ from one sign language to another.
