निम्नलिखित में से कौन सा विकल्प एक मानक कम्पास ट्रैवर्स के लिए क्लोजर की कुल रैखिक त्रुटि (linear error of closure) की अनुमेय सीमा को दर्शाता है?

In survey work using a total station with reflector measurements, which of the following sequence of temporary adjustments must be performed at a station?

While carrying out a total station survey on one bank of a 250 m wide river, it is necessary to plot electric transmission posts on the opposite bank. No provision exists for crossing the river and the posts are inaccessible. In which mode should the survey work be done?