Final answer:
The correct tense for 'They submit the proposal by 2024' is the simple present tense.
The tense for 'Lakshmi Prasad Devkota right Muna Madan write its correct tense' is also the simple present tense.
Step-by-step explanation:
In grammar, tense is a category that expresses time reference. Tenses are usually manifested by the use of specific forms of verbs, particularly in their conjugation patterns.
1) The correct tense for the sentence 'They submit the proposal by 2024' is the simple present tense.
This tense is used to describe actions that are habitual, general truths, or future events that are part of a schedule or timetable.
In this case, 'submit' is the base form of the verb which is used when the subject is 'they'.
2) For the sentence 'Lakshmi Prasad Devkota right Muna Madan write its correct tense', it appears to be incomplete or there may be some confusion in the wording.
However, if we assume you are asking about the correct tense of the verbs in the sentence, then it would be in the simple present tense as well: 'Lakshmi Prasad Devkota writes Muna Madan'.