49. Arrange the following four words in alphabetical order.

Answer: A

Explanation:

Assemble, assembled, assembling, assembly

The correct alphabetical order of the words is Assemble, assembled, assembling, assembly.

A) Assemble, assembled, assembling, assembly

This option is correct as it lists the words in proper alphabetical order. Starting with 'Assemble', it is followed by 'assembled', then 'assembling', and finally 'assembly', which adheres to the standard alphabetical sorting rules.

B) Assembly, assemble, assembled, assembling

This option is incorrect because 'Assembly' should come after 'Assemble' in alphabetical order. The correct sequence requires 'Assemble' to be listed first, making this arrangement flawed.

C) Assemble, assembly, assembling, assembled

This option is also incorrect as it places 'assembly' before 'assembled', which violates the alphabetical ordering. The word 'assembled' should be listed after 'assembling', thus this sequence does not follow the correct order.

D) Assemble, assembly, assembled, assembling

This option is incorrect due to the same reason as option C; it improperly orders 'assembly' before 'assembled'. The correct alphabetical order requires 'assembled' to follow 'assembling', making this arrangement inaccurate.

Conclusion

Option A is definitively correct as it accurately arranges the words in alphabetical order. The other options fail due to misplacement of words that disrupt the proper sequence, demonstrating a misunderstanding of alphabetical arrangement rules.