1. she 2. singing 3. song 4. is 5. a A. 25413 B. 35214 C. 14253 D. 14352

The correct answer is D. 14352.

The first word is “she”, which is a subject pronoun. The second word is “singing”, which is a verb. The third word is “song”, which is a noun. The fourth word is “is”, which is a copular verb. The fifth word is “a”, which is an indefinite article.

The correct order of the words is:

1. She is singing a song.

The other options are incorrect because they do not follow the rules of English grammar. For example, option A, 25413, is incorrect because the verb “singing” comes before the subject pronoun “she”. Option B, 35214, is incorrect because the noun “song” comes before the verb “is”. Option C, 14253, is incorrect because the indefinite article “a” comes before the noun “song”.