Introduction:
The scenario described in the question is when both individuals put out an empty hand for the other to seek. Let's analyze the possible outcomes and explain why the correct answer is option 'A' - efforts are always in vain.

Explanation:
1. Efforts are always in vain: This option suggests that both individuals' attempts to seek each other's attention or communicate are futile. It implies that their actions result in no productive outcome, and their efforts go unrecognized or unreciprocated. The phrase "putting out an empty hand" symbolizes an attempt to engage or connect with the other person, but the gesture remains unacknowledged or unreciprocated. Therefore, their efforts are in vain, leading to no meaningful communication or connection.

2. They got successful in the end: This option suggests that eventually, both individuals are successful in seeking each other's attention or establishing communication. However, this contradicts the information given in the question, which states that both individuals put out an empty hand. It implies that neither person is actively seeking or responding to the other's attempt to connect. Therefore, this option does not align with the scenario described.

3. Father wasn't interested: This option implies that the father, one of the individuals mentioned in the scenario, is not interested in engaging or communicating with the other person. However, the question does not provide any information about the father's level of interest or disinterest. Therefore, this option is not supported by the given scenario.

4. They never had a chance to talk: This option suggests that the individuals involved never had an opportunity to engage in a conversation or communicate. However, the scenario described in the question does not mention any external factors preventing them from talking. It simply states that both individuals put out an empty hand, which indicates a lack of effort or response from both parties. Therefore, this option does not align with the given information.

Conclusion:
Based on the analysis above, the correct answer is option 'A' - efforts are always in vain. This option best reflects the scenario described, where both individuals' attempts to seek each other's attention or communicate go unrecognized or unreciprocated, resulting in no meaningful outcome.