Question-type and answer-type images are not available when creating questions and options (as available in Google Forms).
Image cannot be added to the question on a web view. It can be added using xls sheet. Image uploading is a tedious task for the user to add in question (as it per the blogs published, we got to know that it can be done through xls)
@maheshnalawade, yes, this is not possible with the formbuilder at the moment (which is only possible through the XLSForm).
We already have a feature request for this issue. Maybe you could VOTE for it to make it a reality:
If you have the budget to support this feature, feel free to contact us. Your small contribution would help the entire KoboToolbox user to benefit from the feature.