Correct option is D
Statements:
Some of the topics taught by my teacher are light, sound, and electricity.
None of the topics of magnetism and waves are taught by my teacher.
All the topics taught by my teacher, except thermodynamics, are very comprehensible and interesting.
Analyzing the Conclusions:
Conclusion (i): My teacher teaches the topic sound in a very interesting manner.
From statement (1), we know sound is one of the topics taught by the teacher. Statement (3) indicates that all topics (except thermodynamics) are interesting. Therefore, this conclusion follows.
Conclusion (ii): Magnetism and thermodynamics are not taught by my teacher.
Statement (2) confirms that magnetism is not taught. However, statement (3) does not explicitly state that thermodynamics is not taught; it only says that all other topics, except thermodynamics, are comprehensible and interesting. Thus, we cannot conclude that thermodynamics is not taught. Therefore, this conclusion does not follow.
Conclusion (iii): The topic waves taught by my teacher is not very comprehensible.
From statement (2), we know that waves are not taught by the teacher. Therefore, we cannot make any conclusion about waves being comprehensible or not since they are not part of the topics taught. Hence, this conclusion does not follow.
Final Evaluation:
Conclusion (i) follows.
Conclusion (ii) does not follow.
Conclusion (iii) does not follow.
The correct answer is: (d) Only conclusion (i) follows.