The correct answer is: a) Meetei Mayek (Meitei Mayek)
Meetei Mayek (Meitei Mayek) is a writing system used for the Manipuri language. It is an abugida, which means that each consonant has a basic vowel sound associated with it, and additional diacritics can be added to change the vowel sound. Meetei Mayek is written from left to right, and words are typically separated by spaces.
Devanagari is a writing system used for several languages of India, including Hindi, Marathi, and Nepali. It is an abugida, like Meetei Mayek, and is written from left to right.
Bengali is a writing system used for the Bengali language. It is an abugida, like Meetei Mayek and Devanagari, and is written from left to right.
Roman is the writing system used for the English language, among others. It is an alphabet, which means that each letter represents a single sound. Roman is written from left to right.