Final answer:
The word that is synonymous with 'risqué' and 'lewd' is d.'obscene,' which best fits the description of being offensive, particularly in sexual matters.
Step-by-step explanation:
The word that has synonyms risqué and lewd is d. Obscene. The term risqué generally refers to something that is very close to crossing the line of decency, often in a sexual manner.
Similarly, lewd describes behavior, language, or material that is overtly sexual and offensive in nature.
Based on these definitions, the most suitable synonym among the options provided is obscene, which is often used to describe something offensive or disgusting, particularly in a sexual context.